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## Index: W

\w in regular expressions: 32.9. Regular Expressions: Exceptions in a Character Set
  41.7. Perl Boot Camp, Part 4: Pattern Matching
\W (non-word character character): 32.9. Regular Expressions: Exceptions in a Character Set
W3 mode (Emacs): 19.2. Emacs Features: A Laundry List
wait command: 24.19. Why You Can't Kill a Zombie
  in background jobs: 35.12. Exit Status of Unix Processes
warning or error messages
  Perl (-w option): 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy
  signals as: 24.10. What Are Signals?
watch command: 28.11. Repeating a Time-Varying Command
watchq script: 24.13. Printer Queue Watcher: A Restartable Daemon Shell Script
wc (word count) command: 16.6. Counting Lines, Words, and Characters: wc
  c, -l, and w options: 16.6. Counting Lines, Words, and Characters: wc
  whitespace in output: 16.6. Counting Lines, Words, and Characters: wc
web-browser mode (Emacs): 19.2. Emacs Features: A Laundry List
web browsers (see browsers)
Web, described: 1.21. Unix Networking and Communications
webjump feature, Emacs: 19.2. Emacs Features: A Laundry List
well-known ports, database of: 46.2. /etc/services Is Your Friend
werase key: 5.8. Setting Your Erase, Kill, and Interrupt Characters
wfcmgr program: 47.9.1. Citrix Metaframe
wget utility: 40.7. Interruptable gets with wget
  options: 40.7. Interruptable gets with wget
What You See Is What You Mean (WYSIWYM) editing: 45.13. Formatting Markup Languages — troff, LATEX, HTML, and So On
whatis command: 2.2. whatis: One-Line Command Summaries
wheel (superuser group): 49.2. When Does a User Become a User
  49.6. Groups and Group Ownership
whence command: 2.6. Which Version Am I Using?
whereis command: 2.3. whereis: Finding Where a Command Is Located
  options: 2.3. whereis: Finding Where a Command Is Located
  rsh, checking version of: 6.10.2. Starting a Remote Client with rsh and ssh
  testing command names: 35.27. Picking a Name for a New Command
which command
  alternatives to: 2.6. Which Version Am I Using?
  checking for existing command names: 35.27. Picking a Name for a New Command
  rsh, checking version of: 6.10.2. Starting a Remote Client with rsh and ssh
  setting the prompt variable: 3.9. Gotchas in set prompt Test
while command (awk): 20.10.7. Alphabetical Summary of Commands
while loops: 31.6. Loop Control: break and continue
  asking for variable names and displaying values: 37.2. Bourne Shell Debugger Shows a Shell Variable
  case, shift, and test commands, using with: 35.22. Handling Arguments with while and shift
  endless: 36.6. The Unappreciated Bourne Shell ":" Operator
    36.26. Outputting Text to an X Window
  /g pattern modifier and: 41.7. Perl Boot Camp, Part 4: Pattern Matching
  handling command-line arguments: 35.22. Handling Arguments with while and shift
  in Perl script: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy
  read command used in: 36.11. Standard Input to a for Loop
  with several loop control commands: 36.14. A while Loop with Several Loop Control Commands
  stepping through command-line arguments: 35.20.2. With a Loop
  test command used with: 35.26. test: Testing Files and Strings
  testing exit status: 35.15.2. Looping Until a Command Fails
whitespace
  blank lines, squashing extra with cat -s: 12.7. Squash Extra Blank Lines
  displaying in a line with cat command: 12.4. Show Nonprinting Characters with cat -v or od -c
  in filenames: 8.11. Can't Access a File? Look for Spaces in the Name
    27.14. Quoting Special Characters in Filenames
    finding files with: 9.9. Running Commands on What You Find
      14.16. Problems Deleting Directories
  ignoring in sort command: 22.6.2. Ignoring Blanks
  leading, removing in Emacs from series of lines: 19.2. Emacs Features: A Laundry List
  matching in Perl regular expressions with s: 41.7. Perl Boot Camp, Part 4: Pattern Matching
  newline character: 1.19. When Is a File Not a File?
  removing from text with dedent script: 5.21. Tips for Copy and Paste Between Windows
  separating command arguments: 1.4. Communication with Unix
  shell functions, spaces in: 29.11.1. Simple Functions: ls with Options
  SPACE characters, ASCII: 5.14. Defining What Makes Up a Word for Selection Purposes
  TAB characters
    ASCII: 5.14. Defining What Makes Up a Word for Selection Purposes
    stripping in Bourne shell scripts: 27.16. Here Documents
  wc command output: 16.6. Counting Lines, Words, and Characters: wc
who am i command: 3.12. Terminal Setup: Testing Remote Hostname and X Display
who command: 2.8. Who's On?
  28.14. Command Substitution
  35.25.2. Setting (and Parsing) Parameters
  examples: 35.1. Writing a Simple Shell Program
  GNU version: 2.8. Who's On?
whois command: 46.9. Domain Name Service (DNS)
wildcards: 1.13. Wildcards
  !$ sequence for safety with: 30.6. Using !$ for Safety with Wildcards
  in aliases: 27.7. Wildcards Inside Aliases
  in case statements: 35.10. Test String Values with Bourne-Shell case
    35.11. Pattern Matching in case Statements
  deleting files, use in: 14.3. rm and Its Dangers
  for dot files: 14.16. Problems Deleting Directories
  file creation and: 28.3. Use Wildcards to Create Files?
  file-naming: 33.1. File-Naming Wildcards
    expansion by shells: 33.2. Filename Wildcards in a Nutshell
    failing to match: 33.4. What if a Wildcard Doesn't Match?
    file name and extension as separate entities: 33.2. Filename Wildcards in a Nutshell
    grep -l command, listing matching files: 33.6. Getting a List of Matching Files with grep -l
    grep Ðc, listing nonmatching files: 33.7. Getting a List of Nonmatching Files
    in pathnames: 33.1. File-Naming Wildcards
    listing of: 33.2. Filename Wildcards in a Nutshell
    nom script, listing nonmatching files: 33.8. nom: List Files That Don't Match a Wildcard
    pathnames, not using in: 33.5. Maybe You Shouldn't Use Wildcards in Pathnames
    shell handling of: 33.3. Who Handles Wildcards?
    vgrep script, listing nonmatching files: 33.7.2. The vgrep Script
  in for loops: 35.21. Handling Command-Line Arguments with a for Loop
  limiting searches with: 9.18. Using "Fast find" Databases
  ls command, using shell wildcard pattern: 8.7. Some GNU ls Features
  regular expressions vs.: 32.2. Don't Confuse Regular Expressions with Wildcards
  set command using: 35.25.4. Watch Your Quoting
  shell expansion of: 32.2. Don't Confuse Regular Expressions with Wildcards
  shell, matching with fast find commands: 9.19. Wildcards with "Fast find" Database
  tar, using with: 38.10. Using Wildcards with tar
    GNU tar: 38.10.2. With GNU tar
windows: 4.16. Preprompt, Pre-execution, and Periodic Commands
  (see also terminals; X Window System; xterm)
  chain of processes leading to: 24.20. The Process Chain to Your Window
  closing by killing window processes: 24.22. Close a Window by Killing Its Process(es)
    shell script, using: 24.22.3. Closing a Window from a Shell Script
    web browser (example): 24.22.2. Example #2: A Web Browser
    xterm window (example): 24.22.1. Example #1: An xterm Window
  Emacs: 19.2. Emacs Features: A Laundry List
  Gnome, on Linux: 1.10. The Kernel and Daemons
  Linux, listing on: 1.10. The Kernel and Daemons
  session info in title: 4.8. Session Info in Window Title or Status Line
  starting new from shell: 24.3. Managing Processes: Overall Concepts
  terminal without shells: 24.21. Terminal Windows Without Shells
  testing size for: 3.16. Terminal Setup: Testing Window Size
  twm window manager on VNC: 47.7.2. Setting up VNC on Unix
  xmessage, setting to fit text: 36.26. Outputting Text to an X Window
wine program, emulating Windows API: 47.8.2. Wine
Winmodems,: 44.10. Win Is a Modem Not a Modem?
WINNAME environment variable: 3.17. Terminal Setup: Setting and Testing Window Name
wish shell: 1.6. There Are Many Shells
word lists
  ispell program: 16.5. Adding Words to ispell's Dictionary
    munchlist script: 16.5. Adding Words to ispell's Dictionary
  spell command, in spellhist file: 16.4. Inside spell
  variables set to: 37.5. Quoting and Command-Line Parameters
word vectors: 27.10. Which One Will the C Shell Use?
WORDLIST environment variable: 16.2. Check Spelling Interactively with ispell
  overriding default personal word list: 16.5. Adding Words to ispell's Dictionary
words
  abbreviation in vi editor: 17.23. vi Word Abbreviation
    commands, using as: 17.24. Using vi Abbreviations as Commands (Cut and Paste Between vi's)
    fixing typos with: 17.25. Fixing Typos with vi Abbreviations
  breaking string into with :x operator: 28.5. String Editing (Colon) Operators
  counting with wc command: 16.6. Counting Lines, Words, and Characters: wc
  doubled: 16.7. Find a a Doubled Word
  extracting: 16.9. Just the Words, Please
  matching with < > in regular expressions: 32.12. Regular Expressions: Matching Words with < and >
  selection
    in xterm: 5.14. Defining What Makes Up a Word for Selection Purposes
work function: 29.11.3. Setting Current Shell Environment: The work Function
  29.12. Shell Function Specifics
workgroups: 47.2. Installing and Configuring Samba
working area (CVS): 39.7. CVS Basics
  repository for: 39.7. CVS Basics
  updating workspace: 39.8. More CVS
workstations
  configuring with DHCP: 46.10. Dynamic Host Configuration Protocol (DHCP)
  display: 1.10. The Kernel and Daemons
  private NAT for: 46.11. Gateways and NAT
world (file ownership): 50.2.1. User, Group, and World
World Wide Web, described: 1.21. Unix Networking and Communications
world-write file permissions: 50.2.1. User, Group, and World
  sticky bit, setting for directory: 50.4. Protecting Files with the Sticky Bit
wrappers
  shell script, for other scripts: 35.19. Shell Script "Wrappers" for awk, sed, etc.
  TCP, checking logs in intruder detection: 48.12. TCP Wrappers
wrapping lines in vi, macro for: 18.13. vi Macro for Splitting Long Lines
write command: 1.21. Unix Networking and Communications
  2.7. What tty Am I On?
  ex editor: 20.4. Useful ex Commands
  running from a daemon: 24.13. Printer Queue Watcher: A Restartable Daemon Shell Script
write permission
  changing with chmod: 50.5. Using chmod to Change File Permission
  denying: 50.7. Protect Important Files: Make Them Unwritable
  for directories: 7.3. Access to Directories
    implications of: 50.2. Tutorial on File and Directory Permissions
    renaming or removing files: 50.4. Protecting Files with the Sticky Bit
  directories, renaming or removing files: 50.4. Protecting Files with the Sticky Bit
  files, modifying without: 50.9. A Loophole: Modifying Files Without Write Access
  finding files by: 9.15. Searching for Files by Permission
  group: 50.2.2. Which Group is Which?
  script for adding, editing file, then removing: 50.7. Protect Important Files: Make Them Unwritable
  scripts for changing: 50.8. cx, cw, c-w: Quick File Permission Changes
writewav.pl script: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy
writing output to terminal, enabling/disabling for background jobs: 23.9. Stop Background Output with stty tostop
writing-tar process: 10.13. Copying Directory Trees with tar and Pipes
wtmp file, login information: 3.1. What Happens When You Log In
WTS (Windows Terminal Services), connecting to with Citrix: 47.9. Citrix: Making Windows Multiuser
ww function: 16.7. Find a a Doubled Word
ww.sh script: 16.7. Find a a Doubled Word
wxPython GUI: 42.3.6. wxPython
WYSIWYG (What You See Is What You Get) editing programs: 20.1. Why Line Editors Aren't Dinosaurs
WYSIWYM editors: 45.13. Formatting Markup Languages — troff, LATEX, HTML, and So On

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